获取日期的下一天 java代码
public ResultData getNextDay(String date) throws ParseException {
//格式化
SimpleDateFormat sdf=new SimpleDateFormat("yyyy-MM-dd");
if (StringUtils.isEmpty(date)){
//抛出自定义异常
throw new CherishException(20000,"时间不能空");
}
//转换成时间类
Date date1 = sdf.parse(date);
//获得日历类
Calendar calendar=Calendar.getInstance();
calendar.setTime(date1);
// 把日期往后增加一天.整数往后推,负数往前移动
calendar.add(Calendar.DATE,1);
//返回增加一天后的时间。
String time = sdf.format(calendar.getTime());
return ResultData.ok().data("time",time);
}
常用的Calendar的封装好的方法
package com.cherish.commonutils;
import java.sql.Timestamp;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
public class DateUtils {
public static final String DAFAULT_DATE_FORMAT = "yyyy-M-d";
public static final String DATE_FORMAT = "yyyy-MM-dd";
public static final String DAFAULT_DATETIME_FORMAT = "yyyy-M-d HH:mm:ss";
public static final String DATETIME_FORMAT = "yyyy-MM-dd HH:mm:ss";
public static final String DAFAULT_TIME_FORMAT = "HH:mm:ss";
/**
* 默认构造方法
*/
private DateUtils() {
}
/**
* 当前时间
*
* @return date
*/
public static Date currentDate() {
return Calendar.getInstance().getTime();
}
/**
* 得到年
*
* @param c
* @return
*/
public static int getYear(Calendar c) {
if (c != null) {
return c.get(Calendar.YEAR);
} else {
return Calendar.getInstance().get(Calendar.YEAR);
}
}
/**
* 得到月份
* 注意，这里的月份依然是从0开始的
*
* @param c
* @return
*/
public static int getMonth(Calendar c) {
if (c != null) {
return c.get(Calendar.MONTH) + 1;
} else {
return Calendar.getInstance().get(Calendar.MONTH) + 1;
}
}
/**
* 得到日期
*
* @param c
* @return
*/
public static int getDate(Calendar c) {
if (c != null) {
return c.get(Calendar.DATE);
} else {
return Calendar.getInstance().get(Calendar.DATE);
}
}
/**
* 得到星期
*
* @param c
* @return
*/
public static int getDay(Calendar c) {
if (c != null) {
return c.get(Calendar.DAY_OF_WEEK);
} else {
return Calendar.getInstance().get(Calendar.DAY_OF_WEEK);
}
}
/**
* 得到小时
*
* @param c
* @return
*/
public static int getHour(Calendar c) {
if (c != null) {
return c.get(Calendar.HOUR_OF_DAY);
} else {
return Calendar.getInstance().get(Calendar.HOUR_OF_DAY);
}
}
/**
* 得到分钟
*
* @param c
* @return
*/
public static int getMinute(Calendar c) {
if (c != null) {
return c.get(Calendar.MINUTE);
} else {
return Calendar.getInstance().get(Calendar.MINUTE);
}
}
/**
* 得到秒
*
* @param c
* @return
*/
public static int getSecond(Calendar c) {
if (c != null) {
return c.get(Calendar.SECOND);
} else {
return Calendar.getInstance().get(Calendar.SECOND);
}
}
/**
* 得到指定或者当前时间前n天的Calendar
*
* @param c
* @param n
* @return
*/
public static Calendar beforeNDays(Calendar c, int n) {
//偏移量，给定n天的毫秒数
long offset = n * 24 * 60 * 60 * 1000;
Calendar calendar = null;
if (c != null) {
calendar = c;
} else {
calendar = Calendar.getInstance();
}
calendar.setTimeInMillis(calendar.getTimeInMillis() - offset);
return calendar;
}
/**
* 得到指定或者当前时间后n天的Calendar
*
* @param c
* @param n
* @return
*/
public static Calendar afterNDays(Calendar c, int n) {
//偏移量，给定n天的毫秒数
long offset = n * 24 * 60 * 60 * 1000;
Calendar calendar = null;
if (c != null) {
calendar = c;
} else {
calendar = Calendar.getInstance();
}
calendar.setTimeInMillis(calendar.getTimeInMillis() + offset);
return calendar;
}
/**
* 指定日期加月份
*
* @param date 指定日期
* @param addMonths 要加的月份数
* @return Date 计算后的日期
*/
public static Date addMonths(Date date, int addMonths) {
Calendar calendar = Calendar.getInstance();
calendar.setTime(date);
calendar.add(Calendar.MONTH, addMonths);
return calendar.getTime();
}
/**
* 当前日期加月份
*
* @param addMonths 要加的月份数
* @return Date 计算后的日期
*/
public static Date addMonths(int addMonths) {
return addMonths(new Date(), addMonths);
}
/**
* 指定日期加天
*
* @param date 指定日期
* @param addDays 要加的天数
* @return Date 计算后的日期
*/
public static Date addDays(Date date, int addDays) {
Calendar calendar = Calendar.getInstance();
calendar.setTime(date);
calendar.add(Calendar.DATE, addDays);
return calendar.getTime();
}
/**
* 当前日期加天
*
* @param addDays 要加的天数
* @return Date 计算后的日期
*/
public static Date addDays(int addDays) {
return addDays(new Date(), addDays);
}
/**
* 指定日期加小时
*
* @param date 指定日期
* @param addHours 要加的小时数
* @return Date 计算后的日期
*/
public static Date addHours(Date date, int addHours) {
Calendar calendar = Calendar.getInstance();
calendar.setTime(date);
calendar.add(Calendar.HOUR, addHours);
return calendar.getTime();
}
/**
* 当前日期加小时
*
* @param addHours 要加的小时数
* @return Date 计算后的日期
*/
public static Date addHours(int addHours) {
return addHours(new Date(), addHours);
}
/**
* 指定日期加分
*
* @param date 指定日期
* @param addMinutes 要加的分数
* @return Date 计算后的日期
*/
public static Date addMinutes(Date date, int addMinutes) {
Calendar calendar = Calendar.getInstance();
calendar.setTime(date);
calendar.add(Calendar.MINUTE, addMinutes);
return calendar.getTime();
}
/**
* 当前日期加分
*
* @param addMinutes 要加的分数
* @return Date 计算后的日期
*/
public static Date addMinutes(int addMinutes) {
return addMinutes(new Date(), addMinutes);
}
/**
* 指定日期加秒
*
* @param date 指定日期
* @param addSeconds 要加的秒数
* @return Date 计算后的日期
*/
public static Date addSeconds(Date date, int addSeconds) {
Calendar calendar = Calendar.getInstance();
calendar.setTime(date);
calendar.add(Calendar.SECOND, addSeconds);
return calendar.getTime();
}
/**
* 当前日期加秒
*
* @param addSeconds 要加的秒数
* @return Date 计算后的日期
*/
public static Date addSeconds(int addSeconds) {
return addSeconds(new Date(), addSeconds);
}
/**
* 昨天
*
* @param c
* @return
*/
public static Calendar yesterday(Calendar c) {
long offset = 1 * 24 * 60 * 60 * 1000;
Calendar calendar = null;
if (c != null) {
calendar = c;
} else {
calendar = Calendar.getInstance();
}
calendar.setTimeInMillis(calendar.getTimeInMillis() - offset);
return calendar;
}
/**
* 明天
*
* @param c
* @return
*/
public static Calendar tomorrow(Calendar c) {
long offset = 1 * 24 * 60 * 60 * 1000;
Calendar calendar = null;
if (c != null) {
calendar = c;
} else {
calendar = Calendar.getInstance();
}
calendar.setTimeInMillis(calendar.getTimeInMillis() + offset);
return calendar;
}
/**
* 得到指定或者当前时间前offset毫秒的Calendar
*
* @param c
* @param offset
* @return
*/
public static Calendar before(Calendar c, long offset) {
Calendar calendar = null;
if (c != null) {
calendar = c;
} else {
calendar = Calendar.getInstance();
}
calendar.setTimeInMillis(calendar.getTimeInMillis() - offset);
return calendar;
}
/**
* 得到指定或者当前时间前offset毫秒的Calendar
*
* @param c
* @param offset
* @return
*/
public static Calendar after(Calendar c, long offset) {
Calendar calendar = null;
if (c != null) {
calendar = c;
} else {
calendar = Calendar.getInstance();
}
calendar.setTimeInMillis(calendar.getTimeInMillis() - offset);
return calendar;
}
/**
* 日期格式化
*
* @param c
* @param pattern
* @return
*/
public static String format(Calendar c, String pattern) {
Calendar calendar = null;
if (c != null) {
calendar = c;
} else {
calendar = Calendar.getInstance();
}
if (pattern == null || pattern.equals("")) {
pattern = DATETIME_FORMAT;
}
SimpleDateFormat sdf = new SimpleDateFormat(pattern);
return sdf.format(calendar.getTime());
}
/**
* 日期格式化
*
* @param date 日期
* @param pattern 格式
* @return String 格式化字符串
*/
public static String format(Date date, String pattern) {
Date tempDate = null;
if (date != null) {
tempDate = date;
} else {
tempDate = Calendar.getInstance().getTime();
}
if (pattern == null || pattern.equals("")) {
pattern = DATETIME_FORMAT;
}
SimpleDateFormat sdf = new SimpleDateFormat(pattern);
return sdf.format(tempDate);
}
/**
* Date类型转换到Calendar类型
*
* @param d
* @return
*/
public static Calendar date2Calendar(Date d) {
Calendar c = Calendar.getInstance();
c.setTime(d);
return c;
}
/**
* Calendar类型转换到Date类型
*
* @param c
* @return
*/
public static Date calendar2Date(Calendar c) {
return c.getTime();
}
/**
* Date类型转换到Timestamp类型
*
* @param d
* @return
*/
public static Timestamp date2Timestamp(Date d) {
return new Timestamp(d.getTime());
}
/**
* Calendar类型转换到Timestamp类型
*
* @param c
* @return
*/
public static Timestamp calendar2Timestamp(Calendar c) {
return new Timestamp(c.getTimeInMillis());
}
/**
* Timestamp类型转换到Calendar类型
*
* @param ts
* @return
*/
public static Calendar timestamp2Calendar(Timestamp ts) {
Calendar c = Calendar.getInstance();
c.setTime(ts);
return c;
}
/**
* 得到当前时间的字符串表示
* 格式2010-02-02 12:12:12
*
* @return
*/
public static String getTimeString() {
return format(Calendar.getInstance(), DATETIME_FORMAT);
}
/**
* 标准日期格式字符串解析成Calendar对象
*
* @param s
* @return
*/
public static Calendar pars2Calender(String s) {
Timestamp ts = Timestamp.valueOf(s);
return timestamp2Calendar(ts);
}
}